bowman



UNITED STATES PATENT OFFICE.

A. D. BOWMAN, OF NEW YORK, N. Y.

COMPOUND FOR MAKING WRITING-INK.

Specification forming part of Letters Patent No. 59.549, dated November1 3, 1866.

To all whom it may concern:

Be it known that I, A. D. BOWMAN, of the city of New York, in the countyand State of New York, have invented a new and useful Compound forMaking Writing-Ink; and I do hereby declare that the following is afull, clear, and exact description of the same.

My invention consists in a compound composed of extract of logwood,bichromate of potash, and prussiate of potash, the same to be mixed withwater or other suitable liquid for making writing-ink.

The compound is composed of the following ingredients, in about theproportions specified: extract of logwood, thirty-two (32) parts;bichromate of potash, six (6) parts; prussiate of potash, one (1) part.

These ingredients are carefully pulverized in any proper way, and thenmixed together and shaken, so that a thorough commingling will takeplace. The compound may then be done up in any appropriate Way for themarket.

In making ink with the compound I find that if five hundred andeighty-five (585) grains be put into one (1) gallon of Water anexcellent ink of a consistency to flow freely from the pen will beproduced.

By this invention a compound can be fur-

